/*
		json.js
		2007-03-20

		All of the code contained within this file is released into
		the public domain. Optionally, you may distribute this code
		under the terms of the GNU General Public License as well
		(public domain licensing allows this).
		
*/

function toJSONString(input)
{
	if ( window.JSON )
	{
		return window.JSON.stringify(input);
	}
	var m = {
					'\b': '\\b',
					'\t': '\\t',
					'\n': '\\n',
					'\f': '\\f',
					'\r': '\\r',
					'"' : '\\"',
					'\\': '\\\\'
					};
	var t = typeof(input);
	switch(t)
	{
		case 'string':
			if (/["\\\x00-\x1f]/.test(input))
			{
					return '"' + input.replace(/([\x00-\x1f\\"])/g, function(a, b)
						{
							var c = m[b];
							if (c) {
									return c;
							}
							c = b.charCodeAt();
							return '\\u00' +
									Math.floor(c / 16).toString(16) +
									(c % 16).toString(16);
					}) + '"';
			}
			return '"' + input + '"';
			break;
		case 'array':
			var a = ['['],  
						b,          
						i,          
						l = input.length,
						v;          

				var p = function (s) {

						if (b) {
								a.push(',');
						}
						a.push(s);
						b = true;
				}

				for (i = 0; i < l; i += 1) {
						v = input[i];
						switch (typeof v) {
						case 'object':
							if (v) {
								p(toJSONString(v));
							} else {
								p("null");
							}
							break;
						case 'array':
						case 'string':
						case 'number':
						case 'boolean':
								p(toJSONString(v));
						}
				}

				a.push(']');
				return a.join('');
			break;
		case 'date':
			var f = function (n)
			{
				return n < 10 ? '0' + n : n;
			}
			return '"' + input.getFullYear() + '-' +
 								f(input.getMonth() + 1) + '-' +
 								f(input.getDate()) + 'T' +
 								f(input.getHours()) + ':' +
 								f(input.getMinutes()) + ':' +
 								f(input.getSeconds()) + '"';
 								
		case 'boolean':
			return String(input);
			break;
		case 'number':
			return isFinite(input) ? String(input) : "null";
			break;
		case 'object':
			var a = ['{'],  
					b,          
					k,          
					v;          

			var p = function (s)
			{
				if (b)
				{
					a.push(',');
				}
				a.push(toJSONString(k), ':', s);
				b = true;
			}

			for (k in input) 
			{
				if (input.hasOwnProperty(k))
				{
					v = input[k];
					switch (typeof v) {

						case 'object':
							if (v) {
								p(toJSONString(v));
							} else {
								p("null");
							}
							break;
						case 'string':
						case 'number':
						case 'boolean':
							p(toJSONString(v));
							break;
					}
				}
			}

			a.push('}');
			return a.join('');
			break;
	}
}

function parseJSON(string, filter)
{
	if ( window.JSON )
	{
		return window.JSON.parse(string);
	}
	
	try {
		if (/^("(\\.|[^"\\\n\r])*?"|[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t])+?$/.
						test(string))
		{
	
				var j = eval('(' + string + ')');
				if (typeof filter === 'function') {
	
						function walk(k, v)
						{
								if (v && typeof v === 'object') {
										for (var i in v) {
												if (v.hasOwnProperty(i)) {
														v[i] = walk(i, v[i]);
												}
										}
								}
								return filter(k, v);
						}
	
						j = walk('', j);
				}
				return j;
		}
	} catch (e) {
	
	}
	throw new SyntaxError("parseJSON");
}
